what evidence is there that work is being don...
what evidence is there that work is being done? a a lever is being used. b a simple machine makes a task easier. c the rock has a larger force than the boy. d the boy uses force to move the rock a distance.
Answer
# Brief Explanations:
In physics, work is done when a force is applied over a distance. The boy applying force to move the rock a distance is evidence of work being done. Using a lever (A) or a simple - machine making a task easier (B) are not direct evidence of work being done. The comparison of forces between the rock and the boy (C) is not the key evidence for work being done.
# Answer:
D. The boy uses force to move the rock a distance.